.page-two-box {
  position: relative;
  width: 640px;
  padding-top: 1020px;
  overflow: hidden;
  .share-btn {
    position: absolute;
    right: 32px;
    top: 32px;
    width: 72px;
    height: 72px;
    z-index: 100;
    background: url("../img/icon.share2.png") no-repeat 0 0;
  }
  .back-btn {
    position: absolute;
    left: 32px;
    top: 32px;
    width: 72px;
    height: 72px;
    z-index: 100;
    background: url("../img/icon.back2.png") no-repeat 0 0;
  }

}